condition mean min max 4 h after light 10.8134035 10.503135 11.123672 8 h after light 10.811579 9.558741 12.064417 12 h after light 10.1683345 9.927173 10.409496 4 h after dark 10.524419 10.409496 10.639342 8 h after dark 10.427084 8.605562 12.248606 12 h after dark 9.868684 9.868684 9.868684